Improving the formaldehyde gas sensing performance of the ZnO/SnO2 nanoparticles by PdO decoration

In this work, a series of PdO catalytic ZnO/SnO2 (PdO–ZSO) nanoparticles have been synthesized by a two-step approach including a low-temperature (− 10 °C) precipitation followed by a PdO dipping process. The composition, surface morphology, and crystal structure of the as-obtained samples were characterized by multi-techniques. And the gas-sensing properties toward formaldehyde (HCHO) were evaluated. The results indicate that the PdO–ZSO...